Test R+mfence+pontna+WT+WC

X86_64 R+mfence+pontna+WT+WC
"MFencedWW CoeNaNT PodWRNTNa Fre"
MT=x:WT y:WC
Generator=diyone7 (version 7.56+02~dev)
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Co Fr
Orig=MFencedWW CoeNaNT PodWRNTNa Fre
Align=
{
1:rax=y;
}
 P0          | P1                  ;
 movl $1,(x) | movl $2,%ebx        ;
 mfence      | movntil %ebx,(%rax) ;
 movl $1,(y) | movl (x),%ecx       ;
exists (y=2 /\ 1:rcx=0)